# Relationship history for MSHA mine 1512930

Current hierarchy: **Dunn Mervin → Red Flame Coal Company Inc → No 1 Surface**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** V & M Construction Company → No 1 Surface; 1981-05-01 to 1984-09-24; source msha-controller-operator-history
- **controller_controls_mine:** Breeding Vance & Mervin Dunn → No 1 Surface; 1981-05-01 to 1984-09-24; source msha-controller-operator-history
- **controller_controls_operator:** Breeding Vance & Mervin Dunn → V & M Construction Company; 1981-05-01 to 1984-09-24; source msha-controller-operator-history
- **operator_operates_mine:** Red Flame Coal Company Inc → No 1 Surface; 1984-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dunn Mervin → No 1 Surface; 1984-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dunn Mervin → Red Flame Coal Company Inc; 1984-09-25 to current/open; source msha-controller-operator-history